Ok, I managed to fix most of them!
One that is messing up the alignment for the buttons is from a plugin:
Error Line 41, Column 180: Bad value for attribute media on element link: Media query ended prematurely.
…/ie-css3-support/css/custom-style.css?ver=20121910' type='text/css' media='' />
Any idea how to fix this one? Or even where to edit it? Cheers